C‑358/12Consorzio Stabile Libor Lavori Pubblici v Comune di Milano

Domstolens egne nøkkelord

Reference for a preliminary ruling — Public procurement — Contracts falling below the threshold provided for in Directive 2004/18/EC — Articles 49 TFEU and 56 TFEU — Principle of proportionality — Conditions for exclusion from a tender procedure — Criteria for qualitative selection relating to the personal situation of the tenderer — Obligations relating to the payment of social security contributions — Definition of serious infringement — Difference between the sums owed and those paid which exceeds EUR 100 and is greater than 5% of the sums owed.

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